KR100934010B1 - Manufacturing method of fishing net floats and fishing net float manufactured by said manufacturing method - Google Patents

Abstract

The present invention comprises the steps of uniformly mixing a raw material composition comprising a crosslinking agent and a blowing agent, zinc stearic acid (Zn-St), zinc oxide (ZnO), a pigment in a thermoplastic resin; Injection molding the mixed raw material composition as described above at a temperature at which foaming and crosslinking do not occur to form a spherical body having an inner space; Inserting a hard reinforcement made of a high strength light weight resin into the interior of the main body formed by injection molding as described above; A method for manufacturing a fishing net float comprising a; step of expanding the cross-linking and foaming the main body is inserted into the reinforcement,

Fishing nets manufactured by the manufacturing method as described above is formed in an integral sphere having a space therein, so that the structure is simplified, so that the manufacturing period can be shortened because there is no need to separately form and insert the cap, Since all sides are formed in a sealed state, water can be prevented from penetrating the inside of the buoyancy to prevent the loss of buoyancy. Accordingly, it can be used for a long time and is made of a highly elastic foam, which is resistant to external shocks, thereby minimizing damage. It may be, the reinforcement and the support is provided therein has the effect of more durable.

Fishing nets, thermoplastics, foams, reinforcements, supports

Description

Manufacturing method of fishing nets and fishing nets manufactured by the above method {Manufacturing methods of buoy for fishing net and buoy for fishing net manufactured}

The present invention relates to a method for manufacturing fishing nets used to float a net or the like on a cage farm.

In general, fishing nets with buoyancy are used to raise fishnets such as seaweed, seaweed, and oysters on the sea or to float them in a fixed position in cages.

In general, the general configuration of the fishing net for the fishing net is made of a single styrofoam tubular body, and in order to protect the outer surface of the styrofoam tubing, a hard synthetic resin body or a thick plastic bag is applied to prevent damage. .

However, such a conventional configuration is that the casing of the outer cylinder is easily damaged by an impact from the outside, such as a collision with a fishing boat, or the outer bag is easily torn, so that the inner styrofoam is easily broken, so that the broken styrofoam particles have a relatively short life span. Not only did they become rich and polluted, but turtles and other marine animals also affected the marine ecosystem, including eating and choking floating objects.

Accordingly, in order to solve the problems of the styrofoam float as described above, a hard synthetic resin float has been proposed to have buoyancy by forming an empty space portion therein. It is not easy to break like a styrofoam float, but it is fragile and can easily be broken when colliding with a fishing boat.If the damage is caused by such a collision, water penetrates into the float so that buoyancy is lost and it cannot function. There was a problem.

In order to solve the above problems, recently, polyethylene foam resin spheres having high strength against impact have been used. For example, Utility Model Registration No. 317819 will be described below.

1 is a perspective view showing a conventional float, as shown in the conventional float has a cylindrical body 100 formed of a low-density foamed resin, the central portion of the body 100 through the through-hole 110 ) Is formed, and the both ends of the through-hole 110 is coupled to the cap 200 by a force-fitting combination to form a space in the interior of the body 100, the outside of the body 100 for the rope binding ring 120 and the concave groove 130 was used to fit the rope to the fishing net.

These buoys are made of foamed resin, which is well suspended in water, and resistant to external shocks, and thus are not easily damaged. Thus, since the damage rate is small, marine pollution and the like can be prevented.

However, the mouthpiece is manufactured separately from the cap 200 and the body 100 through the foam molding, the cap 200 and the body 100 respectively manufactured by the foam molding is accurately dimensioned to be firmly coupled to each other It is difficult to manage, so the defect rate is high, and when the cap is forcibly inserted into the body, it is unable to maintain a firm coupling force, so that water may penetrate into the gap between the cap 200 and the body 100 and lose buoyancy of the buoy. Could not be done faithfully.

In addition, since the foamed resin floats as described above usually have a hollow space formed therein to enhance the buoyancy of the floats, the molding mold for forming them is complicated in structure, and the size thereof is increased, resulting in a mold manufacturing cost. Due to the increase in manufacturing cost and the increase in the available installation area, manufacturing costs were forced to rise.

The present invention is to solve the above problems, high strength due to the external impact, as well as the buoyancy of the buoy is continuously maintained can perform a good function, a simple mold made of upper and lower molding mold It is an object of the present invention to provide a method for manufacturing fishing nets that can be manufactured only with a structure.

The present invention to achieve the above object,

Uniformly mixing a thermoplastic composition with a raw material composition comprising a crosslinking agent and a blowing agent, zinc stearic acid (Zn-St), zinc oxide (ZnO), and a pigment;

Injection molding the mixed raw material composition as described above at a temperature at which foaming and crosslinking do not occur to form a spherical body having an inner space;

Inserting a rigid reinforcement made of a high strength light weight resin into the body formed by injection molding as described above and having an empty space therein;

It is achieved by providing a method for manufacturing a fishing net float comprising a; step of expanding the cross-linking and foaming the main body is inserted into the reinforcement.

In addition, the present invention is achieved by providing a method for producing fishing nets, characterized in that the crosslinking agent and the blowing agent used in the raw material composition are higher than the melting point of the thermoplastic synthetic resin.

In the present invention, the raw material composition is 5 to 8 parts by weight of blowing agent, 2 to 5 parts by weight of crosslinking agent, 3 to 6 parts by weight of zinc staric acid, 0.5 to 3 parts by weight of zinc oxide as an additive to 75 parts by weight of ethylene vinyl acetate (EVA). It is achieved by providing the manufacturing method of the fishing net float characterized by adding so that it may be 0.3-1 weight part of pigments.

In addition, the present invention is inserted into the support body made of a high-strength lightweight resin in the form of a rod in close to the inside of the reinforcement in the left, right and up and down directions, or corrugated cardboard, styrofoam, sponge, woven fabric having a honeycomb structure or It is achieved by providing a method for manufacturing a fishing net float characterized in that a support made of woven fabrics on a nonwoven fabric is filled.

In addition, the present invention is achieved by providing a method for manufacturing a fishing net floats characterized in that the main body formed in the injection molding step is coupled to a pair of hemispherical injection molding.

In addition, the present invention is achieved by providing a method for manufacturing fishing nets, characterized in that the cross-linking and foaming step is made by placing the injection molding in the foam molding machine and maintaining the temperature of 165 ~ 200 ℃ for about 40 to 60 minutes.

In addition, the present invention is the manufacture of fishing nets, characterized in that the step of inserting the expanded body in the cross-linking and foaming step into a mold according to the size and shape and heated to a temperature of about 100 ± 5 ℃ is added to the correction By providing a method.

In addition, the present invention is a spherical body manufactured to have an internal space by injection molding, molding and crosslinking a raw material composition comprising a crosslinking agent and a blowing agent, zinc stearic acid (Zn-St), zinc oxide (ZnO), and a pigment in a thermoplastic resin Wow;

A reinforcement body located inside the spherical body and having a hollow space portion made of a high strength lightweight resin;

It is achieved by providing a fishing net float consisting of; a support for filling the inside of the reinforcement to support the reinforcement.

As described above, in the present invention, the manufacturing method of the floats is formed in an integral sphere having a space therein, so that the structure thereof is simplified, so that the manufacturing period can be shortened because there is no need to separately form and insert a cap. Since it is formed in a sealed state, it is possible to prevent the loss of buoyancy by preventing water from penetrating the inside thereof, and thus it is possible to use it for a long time and to minimize damage since it is made of highly elastic foam and resistant to external shocks. It is provided with a reinforcement and a support therein, which has the effect of more durability.

In addition, since the hemispherical body is coupled in a pair, a separate mold for forming an empty space part is not necessary because the structure of the molding mold is simplified, and its size can be reduced, so that the mold manufacturing cost can be reduced. This can be reduced, thereby lowering the overall manufacturing cost.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited to the embodiments shown in the drawings.

According to the present invention, there is provided a method for preparing a ball, comprising uniformly mixing a thermoplastic composition with a raw material composition including a crosslinking agent and a blowing agent, zinc stearic acid (Zn-St), zinc oxide (ZnO), and a pigment; Injection molding the mixed raw material composition at a temperature at which foaming and crosslinking do not occur to form a spherical body having an inner space; Inserting a hard reinforcement made of a high strength light weight resin into the interior of the main body formed by injection molding as described above and having an empty space therein; It is produced by the step of expanding the cross-linking and foaming the main body is inserted into the reinforcement.

First, a raw material composition in which a crosslinking agent and a blowing agent, zinc stearic acid (Zn-St), zinc oxide (ZnO), and pigments are added to the thermoplastic resin commonly used in the mouth is prepared at an appropriate temperature such that crosslinking and foaming do not occur in the mixer. It is mixed uniformly while being added.

In the selection of the raw material composition, consideration should be made that the reaction starting temperature of the crosslinking agent and the blowing agent is much higher than the melting point of the thermoplastic resin, which is followed by the injection molding step of the synthetic resin and the crosslinking and foaming step of the injection molded molding. This is because each proceeds separately.

Therefore, the thermoplastic resin can be used in one kind or a mixture of different kinds, ethylene vinyl acetate (EVA) copolymer is preferably used in the present invention, the crosslinking agent is an organic peroxide that can cause crosslinking reaction of the ethylene vinyl acetate One or two or more of the systems are mixed and used, and in the present invention, di-cumyl peroxide is preferably used. In addition, the foaming agent is appropriately used according to the mechanical foam, chemical foaming, inorganic foaming of the foaming method, in the present invention, azodicarbonamide according to the chemical foaming is preferably used.

The composition ratio of such a raw material composition is 5 to 8 parts by weight of blowing agent, 2 to 5 parts by weight of crosslinking agent, 3 to 6 parts by weight of zinc staric acid, 0.5 to 3 parts by weight of zinc oxide, and 0.3 to 3 parts by weight of ethylene vinyl acetate as an additive. It is preferable to add so that it is 1 weight part. In addition, additives such as modifiers, anti-aging agents, fillers may be added to improve the performance of the composition.

The raw material composition mixed as described above is injected and injection molded into a spherical molding mold in which a ring for connecting a rope is formed, wherein the molding mold used is one that is reduced in size than the main body of the ball to be manufactured. It is important to carry out the injection molding in the molten state but the synthetic resin under the temperature at which the raw material composition does not foam and crosslink. For example, when ethylene vinyl acetate copolymer is used as the synthetic resin of the raw material composition, the temperature during injection molding is preferably performed at 120 ± 5 ° C.

Therefore, the molded article produced through such injection molding is formed in a very reduced form compared to the final manufactured spout despite the main body forming the external shape of the sputter to be manufactured, and the crosslinking agent is still And a blowing agent exist in the state which does not start reaction.

2a and 2b is a view for explaining the injection molding step of the present invention.

As shown in the figure, in the process of manufacturing a spherical body 10 having an internal space by injection molding the raw material composition, the molding mold 1 used for the injection molding corresponds to half of the spherical shape rather than the spherical shape. The main body 10 can also be manufactured using the hemispherical molding mold 1 to be described.

First, the injection molded product manufactured through the hemispherical molding mold 1 as shown in FIG. 2a is a hemispherical body 10a having a shape in which a sphere is cut in half, and when the hemispherical body 10a is paired as shown in FIG. The spherical body 10 in the form of a float is to be produced. Such hemispherical body 10a may be bonded through a polymer reaction in a crosslinking and foaming step, which is the next process, or may be optionally combined before proceeding to the next process for convenience in working process.

Here, the hemispherical molding mold 1 may be formed with both ends of the ring 11 for connecting the ropes as shown in FIG. 2A, but this shows an example according to an embodiment of the present invention. After forming the molding mold 1 so that only one ring 11 is formed in 10a, injection molding a pair of hemispherical bodies 10a, and then joining the rings 11 in opposite directions to each other so that the ropes are formed on both sides. The ring 11 for connecting may be formed.

When the spherical main body 10 is combined with a pair of hemispherical injection moldings as described above, the structure of the molding mold 1 is composed of only the upper and lower molds, which is simplified, and the size is also reduced. This makes it possible to significantly reduce the overall manufacturing cost.

In addition, since the structure is more simplified because the block is formed in all directions, it is not necessary to manufacture or combine a cap or the like separately to form an empty space in the buckle, thereby simplifying the manufacture and shortening the period. Since it is formed to be completely sealed, it prevents water from penetrating into it and prevents the loss of buoyancy so that it can be used for a long time.

3a and 3b are views for explaining the insertion, crosslinking and foaming step of the reinforcement and the support of the present invention.

The hemispherical body 10a produced by the injection molding as described above is subjected to a step of improving the durability of the float by inserting the reinforcement 20 therein.

The reinforcement 20 is prefabricated to have the same shape as the inside so that the reinforcing body 20 can be inserted into the hemispherical body 10a manufactured by injection molding, and the material used therein is high strength and light weight such as ethylene vinyl acetate. Although it is possible to form a resin or a metal such as iron, stainless steel, aluminum, or the like, it is more preferable to use a high-strength lightweight resin having a relatively low weight so that buoyancy of the float cannot be lowered due to the reinforcing body 20.

The reinforcement 20 is intended to maintain the shape of the float even if the external impact due to the collision with the ship, etc., the body 10 in the process of cross-linking and foaming the body 10 later As it expands in and out, an empty space portion is prevented from shrinking, and the shape of the float is prevented from being distorted in the foaming process so as to expand while maintaining the original shape, and through the reinforcement 20, the main body ( 10) The main body 10 may be manufactured to have an empty space without a separate mold for forming a space therein.

On the other hand, it is more preferable to support the inside of the reinforcement 20 by inserting the support 30 in the interior of the reinforcement 20, which is deformed by the external force in addition to the reinforcement 20 It is to prevent becoming.

The support 30 is made of a high-strength lightweight resin such as ethylene vinyl acetate, etc. in the form of a rod to be inserted in close contact with the left, right and up and down directions in the reinforcement 20, or a corrugated cardboard having a honeycomb structure, Filling styrofoam, sponge, woven or non-woven fabrics, such as filling the buoyancy of the buoy without deteriorating, can be used to a variety of things that can absorb the external impact in the reinforcement 20, and can support the inside , They prevent the main body 10 from shrinking in the foaming process and strengthens the durability so that the form is not deformed due to the external impact.

As described above, the pair of hemispherical bodies 10a into which the reinforcement 20 and the support 30 are inserted are crosslinked and foamed in the foam molding machine 2 to expand the size thereof.

As shown in FIG. 3a, the reinforcement 20 is inserted into the injection molded hemispherical body 10a, and the support body 30 is inserted therein again. Thus, the reinforcement body 20 and the support body 30 are When the inserted hemisphere main body 10a is placed in the foam molding machine 2 and heated to the reaction start temperature of the crosslinking agent and the foaming agent contained in the main body 10 in a sealed state, the main body as shown in FIG. 10) is a solid polymer bond due to the reaction of the crosslinking agent and the volume is expanded as a whole by the reaction of the blowing agent.

In the crosslinking and foaming step, the temperature in the foam molding machine 2 varies slightly depending on the type of the crosslinking agent and the blowing agent used in the raw material composition, but the reaction of the crosslinking agent and the blowing agent is generally started at a temperature of 165 to 200 ° C. Maintain the temperature for 40 to 60 minutes to complete the crosslinking and foaming reaction.

As the expanded body 10 has a plurality of internal pores formed in the foaming process, as the thickness thereof is expanded, the strength of the expanded body 10 is improved not only for external impacts such as collision with the hull, but also in the internal pores. It is filled with a high modulus of elasticity can more effectively mitigate the external impact energy.

On the other hand, as described above, the ring 11 may be integrally formed in the main body 11 in the injection molding step, but may be formed in the crosslinking and foaming step after the ring 11 is manufactured separately. When the ring 11 is integrally injection molded with the main body 10 and crosslinked and foamed, the ring 11 softens as the foam 11 is foamed together with the main body 10 to connect the rope and the like. This is because the strength is weak and can be easily broken.

 Therefore, the ring 11 is injection molded with a thermoplastic resin such as ethylene vinyl acetate, which does not contain a blowing agent, and then separately manufactured, and then the separately produced ring 11 is attached in a crosslinking and foaming step of the main body 10. It is more preferable that the ring 11 portion and the main body 10 are combined and integrated by a crosslinking reaction so that the strength of the ring 11 portion can be strengthened.

On the other hand, the main body 10, which has undergone a crosslinking and foaming process as described above, may be distorted due to its shape being distorted in the expansion process, and it is more preferable to additionally perform a calibration step to correct the shape. This calibration step is inserted into the mold according to the size and shape of the expanded body 10 in the previous step and heated to a temperature of about 100 ± 5 ℃ by twisting the portion in the mold is corrected to the overall balance.

Figure 4 is a perspective view showing a fishing net float prepared by the manufacturing method of the present invention.

As shown in the figure, the float produced by the manufacturing method of the present invention is formed with a ring 11 for connecting the rope to the fully sealed spherical body 10, the structure is simplified, and the manufacturing becomes simpler The manufacturing period can be shortened, and since it is sealed, water can be prevented from penetrating into the main body 10, thereby preventing the buoyancy from being lowered.

In addition, the main body 10 is made of a highly elastic foam having a plurality of internal pores, resistant to external impact, and can effectively alleviate the impact energy due to the air filled in the internal pores, as well as the failure rate is reduced As a result, it is possible to prevent marine pollution due to breakage of the conventional buoys, and the buoyancy can be further improved due to the air filled in the hollow spaces formed by a cylindrical body in which all sides with empty spaces are blocked.

In addition, since the manufacturing method of the float according to the present invention is produced by combining the injection molded hemispherical body using a hemispherical molding mold in a pair, the molding mold used therein is a separate mold for forming an empty space portion inside the mouth. Since it is not necessary, the structure can be simply composed of the upper and lower molds, thereby reducing the unit cost of the molding mold, it is possible to reduce the size of the overall manufacturing cost.

1 is a perspective view showing a conventional ball.

Figures 2a and 2b is a view for explaining the injection molding step of the present invention.

3A and 3B are views for explaining the insertion, crosslinking and foaming steps of the reinforcement and the support of the present invention.

Figure 4 is a perspective view showing a fishing net float prepared by the manufacturing method of the present invention.

<Detailed description of the major symbols in the drawings>

1: molding mold

2: foam molding machine

10: main body

  10a: hemispherical body

  11: ring

20: reinforcement

30: support

Claims (8)

Uniformly mixing a thermoplastic composition with a raw material composition comprising a crosslinking agent and a blowing agent, zinc stearic acid (Zn-St), zinc oxide (ZnO), and a pigment; Forming a spherical body having an inner space portion coupled to the hemispherical body as a pair by injection molding the hemispherical body at a temperature at which foaming and crosslinking do not occur with the mixed raw material composition as described above; Inserting a rigid reinforcement made of a high strength light weight resin into the body formed by injection molding as described above and having an empty space therein; And a step of expanding and expanding the main body into which the reinforcing body is inserted. The method according to claim 1, wherein the crosslinking agent and the blowing agent used in the raw material composition is a reaction starting temperature is higher than the melting point of the thermoplastic synthetic resin. The method of claim 1 or 2, wherein the raw material composition is 5 to 8 parts by weight of blowing agent, 2 to 5 parts by weight of crosslinking agent, 3 to 6 parts by weight of zinc staric acid, 0.5 to zinc oxide as an additive to 75 parts by weight of ethylene vinyl acetate (EVA). It is added so that 3 weight part and 0.3-1 weight part of pigments, The manufacturing method of the fishing net floats characterized by the above-mentioned. The corrugated paper, styrofoam, sponge, woven fabric or the like having a honeycomb structure having a support made of a high strength lightweight resin in the form of a rod in close contact with each other in the left, right, and up and down directions. A method for manufacturing a fishing net float characterized in that the support is made of a woven fabric on a nonwoven fabric. delete The method of claim 4, wherein the crosslinking and foaming step is performed by placing the injection molded product in a foam molding machine and maintaining the temperature of 165 to 200 ° C for about 40 to 60 minutes. The method according to claim 6, wherein the step of inserting the expanded body in the cross-linking and foaming step according to the size and shape of the mold and heated to a temperature of about 100 ± 5 ℃ to prepare a fishing net float characterized in that the addition Way. A spherical body made to have an internal space by injection molding and then foaming and crosslinking a raw material composition comprising a crosslinking agent and a blowing agent, a zinc stearic acid (Zn-St), zinc oxide (ZnO), and a pigment in a thermoplastic resin; A reinforcing body which is manufactured in the same shape as that of the spherical main body and is positioned inside the spherical main body and has a hollow space part made of a high strength light weight resin; A fishing net float comprising: a supporter filled in the reinforcement to support the reinforcement.

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